how much chlorine to add to pool

How Much Chlorine to Add to Pool

Swimming pools are a great way to relax, unwind, and keep yourself in shape. They provide a refreshing respite from the hustle and bustle of daily life. However, if you don’t take care of your pool, you might spend more money than you would like. Maintaining your swimming pool is important to ensure that it remains clean, safe, and healthy for everyone. There are many ways in which you can take care of your swimming pool and prevent any potential problems from arising.

  • Filter water regularly
  • Vacuum the pool
  • Add chemicals

Choosing the Right Pool Chemical for Your Swimming Pool

Choosing the right pool chemical is crucial in maintaining your swimming pool. Therefore, knowing what chemicals are available and how they work is important to make the best decision for your pool. Many different types of chemicals are used in a swimming pool, but not all are appropriate for every type of swimming pool or even for every season.

Ultimately, it is better to consider the pH level, the water’s hardness, and your pool type. The most important factor in choosing the right type of chemical is how long it will last. The longer a chemical lasts, the less you have to replace it, which saves you money in the long run.

For instance, some people use chlorine tablets or a chlorine generator, while others use liquid chlorine or salt. In comparison, some people add salt to their pool, while others may not even need it. It’s all about personal preference, so you’ll have to research what works best for your swimming pool.

Types of Pool Chemicals

Pool chemicals are used to maintain the pH balance of a pool. There are many different types of chemicals available, but they have one thing in common – they all help to clean the pool and make it more sanitary. Here is a list of the most common types of pool chemicals on the market. Each type has its unique features and uses.

Alkalinity Adjusters

Alkalinity adjusters are chemicals added to pools to make the water more alkaline. They lower the pH level of the pool to adjust water hardness, which also increases alkalinity.


A disinfectant kills bacteria and algae by oxidizing them into hypochlorous acid, which is then neutralized by sodium thiosulfate or sodium bisulfite.

Cyanuric Acid

This chemical helps maintain your pool’s pH level by converting the hydrogen ions into hydroxyl ions. It also prevents corrosion and scaling of metal parts in the pool.


Oxidizers help keep a pool clean by breaking down organic material into harmless components. Then, they are further removed from the water with filters or skimmers.


Bromine is a colorless liquid that turns purple when it comes into contact with oxygen. Bromine works well against bacteria, algae, and fungi, but it doesn’t prevent the formation of chloramines as chlorine does.

What Is Chlorine?

Chlorine is a chemical compound used in swimming pools to disinfect water. It kills harmful bacteria, germs, and other microorganisms in the water. Chlorine has a high affinity for water molecules and forms stable compounds with them after reacting.

When chlorine reacts with the organic matter in the pool, it forms hypochlorous acid, which kills all the microorganisms and algae. The by-products of this reaction are mostly chloride ions and hypochlorite ions. Chlorine can be obtained from salt water, but it usually comes in tablets or granules. The importance of chlorine in swimming pools cannot be overstated. Without it, swimmers could contract various illnesses like diarrhea, pneumonia, and more.

Different Forms of Chlorine

Chlorine is a chemical element with a Cl symbol that is widely used in the pool industry. It is a molecule that is essential for the process of disinfecting swimming pools. It is also used in many other areas, such as water treatment, drinking water treatment, and wastewater treatment. The following are the different types of chlorine that are used to sanitize pools.

Granular Chlorine

Granular chlorine is a dry granular product or chlorine powder used to disinfect water. It is typically used to disinfect a pool or spa. However, it is also used to sanitize and deodorize the air in a room. Moreover, it is easier to maintain chlorine in the pool by using chlorine powder.

Liquid Chlorine

Liquid chlorine is an odorless liquid that kills germs and bacteria by reacting with them. It is also mixed with other chemicals to create different types of disinfectants. Furthermore, it is usually used in large or commercial pools. Although it is a cheaper form of chlorine, it requires hard work as it is not easy to balance the pH level of the pool while adding liquid chlorine.

Chlorine Tablets

Chlorine tablets are small disks that are dropped into the water and release chlorine when they react with the water molecules. They are typically found in pools, spas, hot tubs, and swimming pools. The good part about chlorine tablets is that they already contain other beneficial substances like water clarifiers and algaecide. Hence, you don’t need to add these substances separately. It is a wise decision to spend money on chlorine tablets.

Add Chlorine to Pool

How Much Chlorine to Add to the Pool?

When adding chlorine to your pool, you need to ensure that the amount of chlorine is not too low or too high. Too much chlorine concentration will damage the pool equipment and cause health problems. It can cause problems like eye irritation, skin irritation, and even respiratory problems.

The amount of chlorine needed for an ideal swimming pool depends on the number of people using it, the types of filters installed, and, most importantly, the pool size. The chlorine maintenance process is a bit challenging. Maintaining chlorine balance in the swimming pool is necessary, and you should know the correct amount of chlorine needed.

The chlorine level that is supposed to be maintained daily is between 1 and 3 ppm. If your swimming pool has a chlorine level of 1 ppm, and you wish to raise it, then add 0.00013 ounces per gallon. As a result, one ppm chlorine would be increased.

Usually, it is recommended that you add one-half cup of chlorine for every 10,000 gallons of water in the pool. If you use liquid chlorine, pour 52-104 oz. of liquid into 10,000 gallons of water. However, if you add chlorinated quick tabs in your pool, 1-2 tabs for 10,000 gallons of water would be enough. Some people also prefer using chlorinated sticks for swimming pool sanitization. Two chlorinated sticks of 8 oz are more than enough for 10,000 gallons of water.

You can also use a specific formula to determine how much chlorine content must be added to your pool. First, measure and multiply the pool’s length, width, and average depth to attain a cubic volume figure. Next, multiply the final cubic volume value by 7.5 if your swimming pool is rectangular. Similarly, you can multiply the final value by 6.7 if your pool is oval. For a circular pool, you must multiply the final value by 5.9 to achieve the results.

Different Methods of Adding Chlorine to Your Swimming Pool

There are different ways to add chlorine products to your pool. Some chlorination methods require more time and effort than others. In contrast, some are done in a shorter time without too much work. Here are the most common methods of adding chlorine to the pool.

Pool Skimmer Basket

The pool skimmer is the most common method of adding chlorine to a swimming pool. It is an alternative to the traditional method of adding chlorine with a garden hose. The pool skimmer basket has holes at the bottom that allow water to flow through and remove debris. In addition, it helps ensure there is no clogging of pipes or hoses while adding chlorine.

Floating Chlorine Dispenser

The floating chlorine dispenser is a cylindrical container for chlorine pucks. It floats on top of the pool surface with a dispenser. The container releases chlorine into your pool without any need for you to use an external pump. It is the cheapest method to chlorinate a pool. However, it is not considered effective as the chlorine doesn’t disperse well in the pool. Instead, commercial pools prefer other methods to obtain a perfect balance of chlorine concentration.

Automatic Chlorinator

The automatic chlorinator is an automatic device that continuously adds chlorine to your swimming pool without human intervention or input. The device uses a sensor to detect when the water level in the swimming pool has lowered and then activates the chlorination process. It is installed in any size swimming pool. The automatic chlorinator uses an electric pump, chlorinator cartridge, and saltwater generator to add chlorine automatically.

When Is the Best Time to Add Chlorine?

The best time to apply chlorine to your pool is when the temperature is between 60-80 degrees Fahrenheit. However, you should also consider the intensity of sunlight your pool receives during the day. Therefore, it is better to chlorinate the pool early in the morning or during the evening.


Chlorine in the pool can be a source of serious health issues if it is not added properly. Thus, the amount of chlorine in the water should be monitored and maintained at a certain level to avoid any health risks.